/*
 * @文件描述:stm32f4片上SDIO及SD卡驱动
 * @版本:
 * @作者:周晨阳
 * @Date:2021-08-24 14:53:21
 */
#include "mySDIO.h"
#include "sys.h"
/*用于sdio初始化的结构体*/
SDIO_InitTypeDef SDIO_InitStructure;
SDIO_CmdInitTypeDef SDIO_CmdInitStructure;
SDIO_DataInitTypeDef SDIO_DataInitStructure;

SD_Error CmdError(void);
SD_Error CmdResp7Error(void);
SD_Error CmdResp1Error(u8 cmd);
SD_Error CmdResp3Error(void);
SD_Error CmdResp2Error(void);
SD_Error CmdResp6Error(u8 cmd, u16 *prca);
SD_Error SDEnWideBus(u8 enx);
SD_Error IsCardProgramming(u8 *pstatus);
SD_Error FindSCR(u16 rca, u32 *pscr);
u8 convert_from_bytes_to_power_of_two(u16 NumberOfBytes);

static u8 CardType = SDIO_STD_CAPACITY_SD_CARD_V1_1; //SD卡类型（默认为1.x卡）
static u32 CSD_Tab[4], CID_Tab[4], RCA = 0;			 //SD卡CSD,CID以及相对地址(RCA)数据
static u8 DeviceMode = SD_DMA_MODE;					 //工作模式,注意,工作模式必须通过SD_SetDeviceMode,后才算数.这里只是定义一个默认的模式(SD_DMA_MODE)
static u8 StopCondition = 0;						 //是否发送停止传输标志位,DMA多块读写的时候用到
volatile SD_Error TransferError = SD_OK;			 //数据传输错误标志,DMA读写时使用
volatile u8 TransferEnd = 0;						 //传输结束标志,DMA读写时使用
SD_CardInfo SDCardInfo;								 //SD卡信息

//SD_ReadDisk/SD_WriteDisk函数专用buf,当这两个函数的数据缓存区地址不是4字节对齐的时候,
//需要用到该数组,确保数据缓存区地址是4字节对齐的.
__align(4) u8 SDIO_DATA_BUFFER[512];

void SDIO_Register_Deinit()
{
	SDIO->POWER = 0x00000000;
	SDIO->CLKCR = 0x00000000;
	SDIO->ARG = 0x00000000;
	SDIO->CMD = 0x00000000;
	SDIO->DTIMER = 0x00000000;
	SDIO->DLEN = 0x00000000;
	SDIO->DCTRL = 0x00000000;
	SDIO->ICR = 0x00C007FF;
	SDIO->MASK = 0x00000000;
}

//初始化SD卡
//返回值:错误代码;(0,无错误)
SD_Error SD_Init(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;

	SD_Error errorstatus = SD_OK;
	u8 clkdiv = 0;
	//由于SDIO与摄像头接口共用数据线需
	//将摄像头接口PWDN(PG9)拉高，摄像头POWER DOWN，否则有时候SD卡初始化不过
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOG, ENABLE); //使能GPIOG时钟
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;			  //PG9推挽输出
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;		  //推挽输出
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;		  //推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;	  //100MHz
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;		  //上拉
	GPIO_Init(GPIOG, &GPIO_InitStructure);				  //初始化
	GPIO_SetBits(GPIOG, GPIO_Pin_9);					  //拉高

	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOD | RCC_AHB1Periph_DMA2, ENABLE); //使能GPIOC,GPIOD DMA2时钟
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO, ENABLE);											   //SDIO时钟使能
	RCC_APB2PeriphResetCmd(RCC_APB2Periph_SDIO, ENABLE);											   //SDIO复位

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12; //PC8,9,10,11,12复用功能输出
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;													 //复用功能
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;												 //100M
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
	GPIO_Init(GPIOC, &GPIO_InitStructure);		 // PC8,9,10,11,12复用功能输出

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
	GPIO_Init(GPIOD, &GPIO_InitStructure);					//PD2复用功能输出
															//引脚复用映射设置
	GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_SDIO); //PC8,AF12
	GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_SDIO);
	GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_SDIO);
	GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_SDIO);
	GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_SDIO);
	GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_SDIO);

	RCC_APB2PeriphResetCmd(RCC_APB2Periph_SDIO, DISABLE); //SDIO结束复位

	//SDIO外设寄存器设置为默认值
	SDIO_Register_Deinit();

	NVIC_InitStructure.NVIC_IRQChannel = SDIO_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级3
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;		  //子优先级3
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;			  //IRQ通道使能
	NVIC_Init(&NVIC_InitStructure);							  //根据指定的参数初始化VIC寄存器、

	errorstatus = SD_PowerON(); //SD卡上电
	if (errorstatus == SD_OK)
		errorstatus = SD_InitializeCards(); //初始化SD卡
	if (errorstatus == SD_OK)
		errorstatus = SD_GetCardInfo(&SDCardInfo); //获取卡信息
	if (errorstatus == SD_OK)
		errorstatus = SD_SelectDeselect((u32)(SDCardInfo.RCA << 16)); //选中SD卡
	if (errorstatus == SD_OK)
		errorstatus = SD_EnableWideBusOperation(SDIO_BusWide_4b); //4位宽度,如果是MMC卡,则不能用4位模式
	if ((errorstatus == SD_OK) || (SDIO_MULTIMEDIA_CARD == CardType))
	{
		if (SDCardInfo.CardType == SDIO_STD_CAPACITY_SD_CARD_V1_1 || SDCardInfo.CardType == SDIO_STD_CAPACITY_SD_CARD_V2_0)
		{
			clkdiv = SDIO_TRANSFER_CLK_DIV + 2; //V1.1/V2.0卡，设置最高48/4=12Mhz
		}
		else
			clkdiv = SDIO_TRANSFER_CLK_DIV; //SDHC等其他卡，设置最高48/2=24Mhz
		SDIO_Clock_Set(clkdiv);				//设置时钟频率,SDIO时钟计算公式:SDIO_CK时钟=SDIOCLK/[clkdiv+2];其中,SDIOCLK固定为48Mhz
		//errorstatus=SD_SetDeviceMode(SD_DMA_MODE);	//设置为DMA模式
		errorstatus = SD_SetDeviceMode(SD_POLLING_MODE); //设置为查询模式
	}
	return errorstatus;
}
//SDIO时钟初始化设置
//clkdiv:时钟分频系数
//CK时钟=SDIOCLK/[clkdiv+2];(SDIOCLK时钟固定为48Mhz)
void SDIO_Clock_Set(u8 clkdiv)
{
	u32 tmpreg = SDIO->CLKCR;
	tmpreg &= 0XFFFFFF00;
	tmpreg |= clkdiv;
	SDIO->CLKCR = tmpreg;
}

//卡上电
//查询所有SDIO接口上的卡设备,并查询其电压和配置时钟
//返回值:错误代码;(0,无错误)
SD_Error SD_PowerON(void)
{
	u8 i = 0;
	SD_Error errorstatus = SD_OK;
	u32 response = 0, count = 0, validvoltage = 0;
	u32 SDType = SD_STD_CAPACITY;

	/*初始化时的时钟不能大于400KHz*/
	SDIO_InitStructure.SDIO_ClockDiv = SDIO_INIT_CLK_DIV; //SDIO_CK时钟=SDIOCLK/[clkdiv+2];其中,SDIOCLK固定为48Mhz
	SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
	SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;					//不使用bypass模式，直接用HCLK进行分频得到SDIO_CK
	SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;			// 空闲时不关闭时钟电源
	SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_1b;								//1位数据线
	SDIO_InitStructure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable; //硬件流
	SDIO_Init(&SDIO_InitStructure);

	SDIO_SetPowerState(SDIO_PowerState_ON); //上电状态,开启卡时钟
	SDIO->CLKCR |= 1 << 8;					//SDIOCK使能

	for (i = 0; i < 74; i++)
	{

		SDIO_CmdInitStructure.SDIO_Argument = 0x0;					//发送CMD0进入IDLE STAGE模式命令.
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_GO_IDLE_STATE; //cmd0
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_No;		//无响应
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable; //则CPSM在开始发送命令之前等待数据传输结束。
		SDIO_SendCommand(&SDIO_CmdInitStructure);			//写命令进命令寄存器

		errorstatus = CmdError();

		if (errorstatus == SD_OK)
			break;
	}
	if (errorstatus)
		return errorstatus; //返回错误状态

	SDIO_CmdInitStructure.SDIO_Argument = SD_CHECK_PATTERN;	   //发送CMD8,短响应,检查SD卡接口特性
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_IF_COND;   //cmd8
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short; //r7
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;			   //关闭等待中断
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp7Error(); //等待R7响应

	if (errorstatus == SD_OK) //R7响应正常
	{
		CardType = SDIO_STD_CAPACITY_SD_CARD_V2_0; //SD 2.0卡
		SDType = SD_HIGH_CAPACITY;				   //高容量卡
	}

	SDIO_CmdInitStructure.SDIO_Argument = 0x00; //发送CMD55,短响应
	SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_APP_CMD;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure); //发送CMD55,短响应

	errorstatus = CmdResp1Error(SD_CMD_APP_CMD); //等待R1响应

	if (errorstatus == SD_OK) //SD2.0/SD 1.1,否则为MMC卡
	{
		//SD卡,发送ACMD41 SD_APP_OP_COND,参数为:0x80100000
		while ((!validvoltage) && (count < SD_MAX_VOLT_TRIAL))
		{
			SDIO_CmdInitStructure.SDIO_Argument = 0x00;			  //发送CMD55,短响应
			SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_APP_CMD; //CMD55
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure); //发送CMD55,短响应

			errorstatus = CmdResp1Error(SD_CMD_APP_CMD); //等待R1响应

			if (errorstatus != SD_OK)
				return errorstatus; //响应错误

			//acmd41，命令参数由支持的电压范围及HCS位组成，HCS位置一来区分卡是SDSc还是sdhc
			SDIO_CmdInitStructure.SDIO_Argument = SD_VOLTAGE_WINDOW_SD | SDType; //发送ACMD41,短响应
			SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SD_APP_OP_COND;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short; //r3
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);

			errorstatus = CmdResp3Error(); //等待R3响应

			if (errorstatus != SD_OK)
				return errorstatus; //响应错误
			response = SDIO->RESP1;
			;												  //得到响应
			validvoltage = (((response >> 31) == 1) ? 1 : 0); //判断SD卡上电是否完成
			count++;
		}
		if (count >= SD_MAX_VOLT_TRIAL)
		{
			errorstatus = SD_INVALID_VOLTRANGE;
			return errorstatus;
		}
		if (response &= SD_HIGH_CAPACITY)
		{
			CardType = SDIO_HIGH_CAPACITY_SD_CARD;
		}
	}
	else //MMC卡
	{
		//MMC卡,发送CMD1 SDIO_SEND_OP_COND,参数为:0x80FF8000
		while ((!validvoltage) && (count < SD_MAX_VOLT_TRIAL))
		{
			SDIO_CmdInitStructure.SDIO_Argument = SD_VOLTAGE_WINDOW_MMC; //发送CMD1,短响应
			SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SEND_OP_COND;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short; //r3
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);

			errorstatus = CmdResp3Error(); //等待R3响应

			if (errorstatus != SD_OK)
				return errorstatus; //响应错误
			response = SDIO->RESP1;
			; //得到响应
			validvoltage = (((response >> 31) == 1) ? 1 : 0);
			count++;
		}
		if (count >= SD_MAX_VOLT_TRIAL)
		{
			errorstatus = SD_INVALID_VOLTRANGE;
			return errorstatus;
		}
		CardType = SDIO_MULTIMEDIA_CARD;
	}
	return (errorstatus);
}
//SD卡 Power OFF
//返回值:错误代码;(0,无错误)
SD_Error SD_PowerOFF(void)
{

	SDIO_SetPowerState(SDIO_PowerState_OFF); //SDIO电源关闭,时钟停止

	return SD_OK;
}
//初始化所有的卡,并让卡进入就绪状态
//返回值:错误代码
SD_Error SD_InitializeCards(void)
{
	SD_Error errorstatus = SD_OK;
	u16 rca = 0x01;

	if (SDIO_GetPowerState() == SDIO_PowerState_OFF) //检查电源状态,确保为上电状态
	{
		errorstatus = SD_REQUEST_NOT_APPLICABLE;
		return (errorstatus);
	}

	if (SDIO_SECURE_DIGITAL_IO_CARD != CardType) //非SECURE_DIGITAL_IO_CARD
	{
		SDIO_CmdInitStructure.SDIO_Argument = 0x0; //发送CMD2,取得CID,长响应
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_ALL_SEND_CID;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Long;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure); //发送CMD2,取得CID,长响应

		errorstatus = CmdResp2Error(); //等待R2响应

		if (errorstatus != SD_OK)
			return errorstatus; //响应错误

		CID_Tab[0] = SDIO->RESP1;
		CID_Tab[1] = SDIO->RESP2;
		CID_Tab[2] = SDIO->RESP3;
		CID_Tab[3] = SDIO->RESP4;
	}
	if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType) || (SDIO_SECURE_DIGITAL_IO_COMBO_CARD == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType)) //判断卡类型
	{
		SDIO_CmdInitStructure.SDIO_Argument = 0x00;				   //发送CMD3,短响应
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SET_REL_ADDR; //cmd3
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short; //r6
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure); //发送CMD3,短响应

		errorstatus = CmdResp6Error(SD_CMD_SET_REL_ADDR, &rca); //等待R6响应

		if (errorstatus != SD_OK)
			return errorstatus; //响应错误
	}
	if (SDIO_MULTIMEDIA_CARD == CardType)
	{

		SDIO_CmdInitStructure.SDIO_Argument = (u32)(rca << 16);	   //发送CMD3,短响应
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SET_REL_ADDR; //cmd3
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short; //r6
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure); //发送CMD3,短响应

		errorstatus = CmdResp2Error(); //等待R2响应

		if (errorstatus != SD_OK)
			return errorstatus; //响应错误
	}
	if (SDIO_SECURE_DIGITAL_IO_CARD != CardType) //非SECURE_DIGITAL_IO_CARD
	{
		RCA = rca;

		SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)(rca << 16); //发送CMD9+卡RCA,取得CSD,长响应
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SEND_CSD;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Long;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp2Error(); //等待R2响应
		if (errorstatus != SD_OK)
			return errorstatus; //响应错误

		CSD_Tab[0] = SDIO->RESP1;
		CSD_Tab[1] = SDIO->RESP2;
		CSD_Tab[2] = SDIO->RESP3;
		CSD_Tab[3] = SDIO->RESP4;
	}
	return SD_OK; //卡初始化成功
}
//得到卡信息
//cardinfo:卡信息存储区
//返回值:错误状态
SD_Error SD_GetCardInfo(SD_CardInfo *cardinfo)
{
	SD_Error errorstatus = SD_OK;
	u8 tmp = 0;
	cardinfo->CardType = (u8)CardType; //卡类型
	cardinfo->RCA = (u16)RCA;		   //卡RCA值
	tmp = (u8)((CSD_Tab[0] & 0xFF000000) >> 24);
	cardinfo->SD_csd.CSDStruct = (tmp & 0xC0) >> 6;		   //CSD结构
	cardinfo->SD_csd.SysSpecVersion = (tmp & 0x3C) >> 2;   //2.0协议还没定义这部分(为保留),应该是后续协议定义的
	cardinfo->SD_csd.Reserved1 = tmp & 0x03;			   //2个保留位
	tmp = (u8)((CSD_Tab[0] & 0x00FF0000) >> 16);		   //第1个字节
	cardinfo->SD_csd.TAAC = tmp;						   //数据读时间1
	tmp = (u8)((CSD_Tab[0] & 0x0000FF00) >> 8);			   //第2个字节
	cardinfo->SD_csd.NSAC = tmp;						   //数据读时间2
	tmp = (u8)(CSD_Tab[0] & 0x000000FF);				   //第3个字节
	cardinfo->SD_csd.MaxBusClkFrec = tmp;				   //传输速度
	tmp = (u8)((CSD_Tab[1] & 0xFF000000) >> 24);		   //第4个字节
	cardinfo->SD_csd.CardComdClasses = tmp << 4;		   //卡指令类高四位
	tmp = (u8)((CSD_Tab[1] & 0x00FF0000) >> 16);		   //第5个字节
	cardinfo->SD_csd.CardComdClasses |= (tmp & 0xF0) >> 4; //卡指令类低四位
	cardinfo->SD_csd.RdBlockLen = tmp & 0x0F;			   //最大读取数据长度
	tmp = (u8)((CSD_Tab[1] & 0x0000FF00) >> 8);			   //第6个字节
	cardinfo->SD_csd.PartBlockRead = (tmp & 0x80) >> 7;	   //允许分块读
	cardinfo->SD_csd.WrBlockMisalign = (tmp & 0x40) >> 6;  //写块错位
	cardinfo->SD_csd.RdBlockMisalign = (tmp & 0x20) >> 5;  //读块错位
	cardinfo->SD_csd.DSRImpl = (tmp & 0x10) >> 4;
	cardinfo->SD_csd.Reserved2 = 0;																											//保留
	if ((CardType == SDIO_STD_CAPACITY_SD_CARD_V1_1) || (CardType == SDIO_STD_CAPACITY_SD_CARD_V2_0) || (SDIO_MULTIMEDIA_CARD == CardType)) //标准1.1/2.0卡/MMC卡
	{
		cardinfo->SD_csd.DeviceSize = (tmp & 0x03) << 10; //C_SIZE(12位)
		tmp = (u8)(CSD_Tab[1] & 0x000000FF);			  //第7个字节
		cardinfo->SD_csd.DeviceSize |= (tmp) << 2;
		tmp = (u8)((CSD_Tab[2] & 0xFF000000) >> 24); //第8个字节
		cardinfo->SD_csd.DeviceSize |= (tmp & 0xC0) >> 6;
		cardinfo->SD_csd.MaxRdCurrentVDDMin = (tmp & 0x38) >> 3;
		cardinfo->SD_csd.MaxRdCurrentVDDMax = (tmp & 0x07);
		tmp = (u8)((CSD_Tab[2] & 0x00FF0000) >> 16); //第9个字节
		cardinfo->SD_csd.MaxWrCurrentVDDMin = (tmp & 0xE0) >> 5;
		cardinfo->SD_csd.MaxWrCurrentVDDMax = (tmp & 0x1C) >> 2;
		cardinfo->SD_csd.DeviceSizeMul = (tmp & 0x03) << 1; //C_SIZE_MULT
		tmp = (u8)((CSD_Tab[2] & 0x0000FF00) >> 8);			//第10个字节
		cardinfo->SD_csd.DeviceSizeMul |= (tmp & 0x80) >> 7;
		cardinfo->CardCapacity = (cardinfo->SD_csd.DeviceSize + 1); //计算卡容量
		cardinfo->CardCapacity *= (1 << (cardinfo->SD_csd.DeviceSizeMul + 2));
		cardinfo->CardBlockSize = 1 << (cardinfo->SD_csd.RdBlockLen); //块大小
		cardinfo->CardCapacity *= cardinfo->CardBlockSize;
	}
	else if (CardType == SDIO_HIGH_CAPACITY_SD_CARD) //高容量卡
	{
		tmp = (u8)(CSD_Tab[1] & 0x000000FF);			  //第7个字节
		cardinfo->SD_csd.DeviceSize = (tmp & 0x3F) << 16; //C_SIZE
		tmp = (u8)((CSD_Tab[2] & 0xFF000000) >> 24);	  //第8个字节
		cardinfo->SD_csd.DeviceSize |= (tmp << 8);
		tmp = (u8)((CSD_Tab[2] & 0x00FF0000) >> 16); //第9个字节
		cardinfo->SD_csd.DeviceSize |= (tmp);
		tmp = (u8)((CSD_Tab[2] & 0x0000FF00) >> 8);											//第10个字节
		cardinfo->CardCapacity = (long long)(cardinfo->SD_csd.DeviceSize + 1) * 512 * 1024; //计算卡容量
		cardinfo->CardBlockSize = 512;														//块大小固定为512字节
	}
	cardinfo->SD_csd.EraseGrSize = (tmp & 0x40) >> 6;
	cardinfo->SD_csd.EraseGrMul = (tmp & 0x3F) << 1;
	tmp = (u8)(CSD_Tab[2] & 0x000000FF); //第11个字节
	cardinfo->SD_csd.EraseGrMul |= (tmp & 0x80) >> 7;
	cardinfo->SD_csd.WrProtectGrSize = (tmp & 0x7F);
	tmp = (u8)((CSD_Tab[3] & 0xFF000000) >> 24); //第12个字节
	cardinfo->SD_csd.WrProtectGrEnable = (tmp & 0x80) >> 7;
	cardinfo->SD_csd.ManDeflECC = (tmp & 0x60) >> 5;
	cardinfo->SD_csd.WrSpeedFact = (tmp & 0x1C) >> 2;
	cardinfo->SD_csd.MaxWrBlockLen = (tmp & 0x03) << 2;
	tmp = (u8)((CSD_Tab[3] & 0x00FF0000) >> 16); //第13个字节
	cardinfo->SD_csd.MaxWrBlockLen |= (tmp & 0xC0) >> 6;
	cardinfo->SD_csd.WriteBlockPaPartial = (tmp & 0x20) >> 5;
	cardinfo->SD_csd.Reserved3 = 0;
	cardinfo->SD_csd.ContentProtectAppli = (tmp & 0x01);
	tmp = (u8)((CSD_Tab[3] & 0x0000FF00) >> 8); //第14个字节
	cardinfo->SD_csd.FileFormatGrouop = (tmp & 0x80) >> 7;
	cardinfo->SD_csd.CopyFlag = (tmp & 0x40) >> 6;
	cardinfo->SD_csd.PermWrProtect = (tmp & 0x20) >> 5;
	cardinfo->SD_csd.TempWrProtect = (tmp & 0x10) >> 4;
	cardinfo->SD_csd.FileFormat = (tmp & 0x0C) >> 2;
	cardinfo->SD_csd.ECC = (tmp & 0x03);
	tmp = (u8)(CSD_Tab[3] & 0x000000FF); //第15个字节
	cardinfo->SD_csd.CSD_CRC = (tmp & 0xFE) >> 1;
	cardinfo->SD_csd.Reserved4 = 1;
	tmp = (u8)((CID_Tab[0] & 0xFF000000) >> 24); //第0个字节
	cardinfo->SD_cid.ManufacturerID = tmp;
	tmp = (u8)((CID_Tab[0] & 0x00FF0000) >> 16); //第1个字节
	cardinfo->SD_cid.OEM_AppliID = tmp << 8;
	tmp = (u8)((CID_Tab[0] & 0x000000FF00) >> 8); //第2个字节
	cardinfo->SD_cid.OEM_AppliID |= tmp;
	tmp = (u8)(CID_Tab[0] & 0x000000FF); //第3个字节
	cardinfo->SD_cid.ProdName1 = tmp << 24;
	tmp = (u8)((CID_Tab[1] & 0xFF000000) >> 24); //第4个字节
	cardinfo->SD_cid.ProdName1 |= tmp << 16;
	tmp = (u8)((CID_Tab[1] & 0x00FF0000) >> 16); //第5个字节
	cardinfo->SD_cid.ProdName1 |= tmp << 8;
	tmp = (u8)((CID_Tab[1] & 0x0000FF00) >> 8); //第6个字节
	cardinfo->SD_cid.ProdName1 |= tmp;
	tmp = (u8)(CID_Tab[1] & 0x000000FF); //第7个字节
	cardinfo->SD_cid.ProdName2 = tmp;
	tmp = (u8)((CID_Tab[2] & 0xFF000000) >> 24); //第8个字节
	cardinfo->SD_cid.ProdRev = tmp;
	tmp = (u8)((CID_Tab[2] & 0x00FF0000) >> 16); //第9个字节
	cardinfo->SD_cid.ProdSN = tmp << 24;
	tmp = (u8)((CID_Tab[2] & 0x0000FF00) >> 8); //第10个字节
	cardinfo->SD_cid.ProdSN |= tmp << 16;
	tmp = (u8)(CID_Tab[2] & 0x000000FF); //第11个字节
	cardinfo->SD_cid.ProdSN |= tmp << 8;
	tmp = (u8)((CID_Tab[3] & 0xFF000000) >> 24); //第12个字节
	cardinfo->SD_cid.ProdSN |= tmp;
	tmp = (u8)((CID_Tab[3] & 0x00FF0000) >> 16); //第13个字节
	cardinfo->SD_cid.Reserved1 |= (tmp & 0xF0) >> 4;
	cardinfo->SD_cid.ManufactDate = (tmp & 0x0F) << 8;
	tmp = (u8)((CID_Tab[3] & 0x0000FF00) >> 8); //第14个字节
	cardinfo->SD_cid.ManufactDate |= tmp;
	tmp = (u8)(CID_Tab[3] & 0x000000FF); //第15个字节
	cardinfo->SD_cid.CID_CRC = (tmp & 0xFE) >> 1;
	cardinfo->SD_cid.Reserved2 = 1;
	return errorstatus;
}
//设置SDIO总线宽度(MMC卡不支持4bit模式)
//wmode:位宽模式.0,1位数据宽度;1,4位数据宽度;2,8位数据宽度
//返回值:SD卡错误状态

//设置SDIO总线宽度(MMC卡不支持4bit模式)
//   @arg SDIO_BusWide_8b: 8-bit data transfer (Only for MMC)
//   @arg SDIO_BusWide_4b: 4-bit data transfer
//   @arg SDIO_BusWide_1b: 1-bit data transfer (默认)
//返回值:SD卡错误状态
SD_Error SD_EnableWideBusOperation(u32 WideMode)
{
	SD_Error errorstatus = SD_OK;
	if (SDIO_MULTIMEDIA_CARD == CardType)
	{
		errorstatus = SD_UNSUPPORTED_FEATURE;
		return (errorstatus);
	}
	else if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
	{
		if (SDIO_BusWide_8b == WideMode) //2.0 sd不支持8bits
		{
			errorstatus = SD_UNSUPPORTED_FEATURE;
			return (errorstatus);
		}
		else
		{
			errorstatus = SDEnWideBus(WideMode);
			if (SD_OK == errorstatus)
			{
				SDIO->CLKCR &= ~(3 << 11); //清除之前的位宽设置
				SDIO->CLKCR |= WideMode;   //1位/4位总线宽度
				SDIO->CLKCR |= 0 << 14;	   //不开启硬件流控制
			}
		}
	}
	return errorstatus;
}
//设置SD卡工作模式
//Mode:
//返回值:错误状态
SD_Error SD_SetDeviceMode(u32 Mode)
{
	SD_Error errorstatus = SD_OK;
	if ((Mode == SD_DMA_MODE) || (Mode == SD_POLLING_MODE))
		DeviceMode = Mode;
	else
		errorstatus = SD_INVALID_PARAMETER;
	return errorstatus;
}
//选卡
//发送CMD7,选择相对地址(rca)为addr的卡,取消其他卡.如果为0,则都不选择.
//addr:卡的RCA地址
SD_Error SD_SelectDeselect(u32 addr)
{

	SDIO_CmdInitStructure.SDIO_Argument = addr; //发送CMD7,选择卡,短响应
	SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SEL_DESEL_CARD;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure); //发送CMD7,选择卡,短响应

	return CmdResp1Error(SD_CMD_SEL_DESEL_CARD);
}
//SD卡读取一个块
//buf:读数据缓存区(必须4字节对齐!!)
//addr:读取地址
//blksize:块大小
SD_Error SD_ReadBlock(u8 *buf, long long addr, u16 blksize)
{
	SD_Error errorstatus = SD_OK;
	u8 power;
	u32 count = 0, *tempbuff = (u32 *)buf; //转换为u32指针
	u32 timeout = SDIO_DATATIMEOUT;
	if (NULL == buf)
		return SD_INVALID_PARAMETER;
	SDIO->DCTRL = 0x0; //数据控制寄存器清零(关DMA)

	if (CardType == SDIO_HIGH_CAPACITY_SD_CARD) //大容量卡
	{
		blksize = 512;
		addr >>= 9;
	}
	SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_1b; //清除DPSM状态机配置
	SDIO_DataInitStructure.SDIO_DataLength = 0;
	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataConfig(&SDIO_DataInitStructure);

	if (SDIO->RESP1 & SD_CARD_LOCKED)
		return SD_LOCK_UNLOCK_FAILED; //卡锁了
	if ((blksize > 0) && (blksize <= 2048) && ((blksize & (blksize - 1)) == 0))
	{
		power = convert_from_bytes_to_power_of_two(blksize);

		SDIO_CmdInitStructure.SDIO_Argument = blksize;
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SET_BLOCKLEN;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure); //发送CMD16+设置数据长度为blksize,短响应

		errorstatus = CmdResp1Error(SD_CMD_SET_BLOCKLEN); //等待R1响应

		if (errorstatus != SD_OK)
			return errorstatus; //响应错误
	}
	else
		return SD_INVALID_PARAMETER;

	SDIO_DataInitStructure.SDIO_DataBlockSize = power << 4; //清除DPSM状态机配置
	SDIO_DataInitStructure.SDIO_DataLength = blksize;
	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToSDIO;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataConfig(&SDIO_DataInitStructure);

	SDIO_CmdInitStructure.SDIO_Argument = addr;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_READ_SINGLE_BLOCK;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure); //发送CMD17+从addr地址出读取数据,短响应

	errorstatus = CmdResp1Error(SD_CMD_READ_SINGLE_BLOCK); //等待R1响应
	if (errorstatus != SD_OK)
		return errorstatus;			   //响应错误
	if (DeviceMode == SD_POLLING_MODE) //查询模式,轮询数据
	{
		INTX_DISABLE();																   //关闭总中断(POLLING模式,严禁中断打断SDIO读写操作!!!)
		while (!(SDIO->STA & ((1 << 5) | (1 << 1) | (1 << 3) | (1 << 10) | (1 << 9)))) //无上溢/CRC/超时/完成(标志)/起始位错误
		{
			if (SDIO_GetFlagStatus(SDIO_FLAG_RXFIFOHF) != RESET) //接收区半满,表示至少存了8个字
			{
				for (count = 0; count < 8; count++) //循环读取数据
				{
					*(tempbuff + count) = SDIO->FIFO;
				}
				tempbuff += 8;
				timeout = 0X7FFFFF; //读数据溢出时间
			}
			else //处理超时
			{
				if (timeout == 0)
					return SD_DATA_TIMEOUT;
				timeout--;
			}
		}
		if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET) //数据超时错误
		{
			SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT); //清错误标志
			return SD_DATA_TIMEOUT;
		}
		else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET) //数据块CRC错误
		{
			SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL); //清错误标志
			return SD_DATA_CRC_FAIL;
		}
		else if (SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET) //接收fifo上溢错误
		{
			SDIO_ClearFlag(SDIO_FLAG_RXOVERR); //清错误标志
			return SD_RX_OVERRUN;
		}
		else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET) //接收起始位错误
		{
			SDIO_ClearFlag(SDIO_FLAG_STBITERR); //清错误标志
			return SD_START_BIT_ERR;
		}
		while (SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET) //FIFO里面,还存在可用数据
		{
			*tempbuff = SDIO->FIFO; //循环读取数据
			tempbuff++;
		}
		INTX_ENABLE();					   //开启总中断
		SDIO_ClearFlag(SDIO_STATIC_FLAGS); //清除所有标记
	}
	else if (DeviceMode == SD_DMA_MODE)
	{
		TransferError = SD_OK;
		StopCondition = 0;													//单块读,不需要发送停止传输指令
		TransferEnd = 0;													//传输结束标置位，在中断服务置1
		SDIO->MASK |= (1 << 1) | (1 << 3) | (1 << 8) | (1 << 5) | (1 << 9); //配置需要的中断
		SDIO->DCTRL |= 1 << 3;												//SDIO DMA使能
		SD_DMA_Config((u32 *)buf, blksize, DMA_DIR_PeripheralToMemory);
		while (((DMA2->LISR & (1 << 27)) == RESET) && (TransferEnd == 0) && (TransferError == SD_OK) && timeout)
			timeout--; //等待传输完成
		if (timeout == 0)
			return SD_DATA_TIMEOUT; //超时
		if (TransferError != SD_OK)
			errorstatus = TransferError;
	}
	return errorstatus;
}
//SD卡读取多个块
//buf:读数据缓存区
//addr:读取地址
//blksize:块大小
//nblks:要读取的块数
//返回值:错误状态
__align(4) u32 *tempbuff;
SD_Error SD_ReadMultiBlocks(u8 *buf, long long addr, u16 blksize, u32 nblks)
{
	SD_Error errorstatus = SD_OK;
	u8 power;
	u32 count = 0;
	u32 timeout = SDIO_DATATIMEOUT;
	tempbuff = (u32 *)buf; //转换为u32指针

	SDIO->DCTRL = 0x0;							//数据控制寄存器清零(关DMA)
	if (CardType == SDIO_HIGH_CAPACITY_SD_CARD) //大容量卡
	{
		blksize = 512;
		addr >>= 9;
	}

	SDIO_DataInitStructure.SDIO_DataBlockSize = 0;
	; //清除DPSM状态机配置
	SDIO_DataInitStructure.SDIO_DataLength = 0;
	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataConfig(&SDIO_DataInitStructure);

	if (SDIO->RESP1 & SD_CARD_LOCKED)
		return SD_LOCK_UNLOCK_FAILED; //卡锁了
	if ((blksize > 0) && (blksize <= 2048) && ((blksize & (blksize - 1)) == 0))
	{
		power = convert_from_bytes_to_power_of_two(blksize);

		SDIO_CmdInitStructure.SDIO_Argument = blksize; //发送CMD16+设置数据长度为blksize,短响应
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SET_BLOCKLEN;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SD_CMD_SET_BLOCKLEN); //等待R1响应

		if (errorstatus != SD_OK)
			return errorstatus; //响应错误
	}
	else
		return SD_INVALID_PARAMETER;

	if (nblks > 1) //多块读
	{
		if (nblks * blksize > SD_MAX_DATA_LENGTH)
			return SD_INVALID_PARAMETER; //判断是否超过最大接收长度

		SDIO_DataInitStructure.SDIO_DataBlockSize = power << 4;
		; //nblks*blksize,512块大小,卡到控制器
		SDIO_DataInitStructure.SDIO_DataLength = nblks * blksize;
		SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
		SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
		SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToSDIO;
		SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
		SDIO_DataConfig(&SDIO_DataInitStructure);

		SDIO_CmdInitStructure.SDIO_Argument = addr; //发送CMD18+从addr地址出读取数据,短响应
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_READ_MULT_BLOCK;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SD_CMD_READ_MULT_BLOCK); //等待R1响应

		if (errorstatus != SD_OK)
			return errorstatus; //响应错误

		if (DeviceMode == SD_POLLING_MODE)
		{
			INTX_DISABLE();																  //关闭总中断(POLLING模式,严禁中断打断SDIO读写操作!!!)
			while (!(SDIO->STA & ((1 << 5) | (1 << 1) | (1 << 3) | (1 << 8) | (1 << 9)))) //无上溢/CRC/超时/完成(标志)/起始位错误
			{
				if (SDIO_GetFlagStatus(SDIO_FLAG_RXFIFOHF) != RESET) //接收区半满,表示至少存了8个字
				{
					for (count = 0; count < 8; count++) //循环读取数据
					{
						*(tempbuff + count) = SDIO->FIFO;
					}
					tempbuff += 8;
					timeout = 0X7FFFFF; //读数据溢出时间
				}
				else //处理超时
				{
					if (timeout == 0)
						return SD_DATA_TIMEOUT;
					timeout--;
				}
			}
			if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET) //数据超时错误
			{
				SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT); //清错误标志
				return SD_DATA_TIMEOUT;
			}
			else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET) //数据块CRC错误
			{
				SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL); //清错误标志
				return SD_DATA_CRC_FAIL;
			}
			else if (SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET) //接收fifo上溢错误
			{
				SDIO_ClearFlag(SDIO_FLAG_RXOVERR); //清错误标志
				return SD_RX_OVERRUN;
			}
			else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET) //接收起始位错误
			{
				SDIO_ClearFlag(SDIO_FLAG_STBITERR); //清错误标志
				return SD_START_BIT_ERR;
			}

			while (SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET) //FIFO里面,还存在可用数据
			{
				*tempbuff = SDIO->FIFO; //循环读取数据
				tempbuff++;
			}
			if (SDIO_GetFlagStatus(SDIO_FLAG_DATAEND) != RESET) //接收结束
			{
				if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
				{
					SDIO_CmdInitStructure.SDIO_Argument = 0; //发送CMD12+结束传输
					SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_STOP_TRANSMISSION;
					SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
					SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
					SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
					SDIO_SendCommand(&SDIO_CmdInitStructure);

					errorstatus = CmdResp1Error(SD_CMD_STOP_TRANSMISSION); //等待R1响应

					if (errorstatus != SD_OK)
						return errorstatus;
				}
			}
			INTX_ENABLE();					   //开启总中断
			SDIO_ClearFlag(SDIO_STATIC_FLAGS); //清除所有标记
		}
		else if (DeviceMode == SD_DMA_MODE)
		{
			TransferError = SD_OK;
			StopCondition = 1;													//多块读,需要发送停止传输指令
			TransferEnd = 0;													//传输结束标置位，在中断服务置1
			SDIO->MASK |= (1 << 1) | (1 << 3) | (1 << 8) | (1 << 5) | (1 << 9); //配置需要的中断
			SDIO->DCTRL |= 1 << 3;												//SDIO DMA使能
			SD_DMA_Config((u32 *)buf, nblks * blksize, DMA_DIR_PeripheralToMemory);
			while (((DMA2->LISR & (1 << 27)) == RESET) && timeout)
				timeout--; //等待传输完成
			if (timeout == 0)
				return SD_DATA_TIMEOUT; //超时
			while ((TransferEnd == 0) && (TransferError == SD_OK))
				;
			if (TransferError != SD_OK)
				errorstatus = TransferError;
		}
	}
	return errorstatus;
}
//SD卡写1个块
//buf:数据缓存区
//addr:写地址
//blksize:块大小
//返回值:错误状态
SD_Error SD_WriteBlock(u8 *buf, long long addr, u16 blksize)
{
	SD_Error errorstatus = SD_OK;

	u8 power = 0, cardstate = 0;

	u32 timeout = 0, bytestransferred = 0;

	u32 cardstatus = 0, count = 0, restwords = 0;

	u32 tlen = blksize; //总长度(字节)

	u32 *tempbuff = (u32 *)buf;

	if (buf == NULL)
		return SD_INVALID_PARAMETER; //参数错误

	SDIO->DCTRL = 0x0; //数据控制寄存器清零(关DMA)

	SDIO_DataInitStructure.SDIO_DataBlockSize = 0;
	; //清除DPSM状态机配置
	SDIO_DataInitStructure.SDIO_DataLength = 0;
	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataConfig(&SDIO_DataInitStructure);

	if (SDIO->RESP1 & SD_CARD_LOCKED)
		return SD_LOCK_UNLOCK_FAILED;			//卡锁了
	if (CardType == SDIO_HIGH_CAPACITY_SD_CARD) //大容量卡
	{
		blksize = 512;
		addr >>= 9;
	}
	if ((blksize > 0) && (blksize <= 2048) && ((blksize & (blksize - 1)) == 0))
	{
		power = convert_from_bytes_to_power_of_two(blksize);

		SDIO_CmdInitStructure.SDIO_Argument = blksize; //发送CMD16+设置数据长度为blksize,短响应
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SET_BLOCKLEN;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SD_CMD_SET_BLOCKLEN); //等待R1响应

		if (errorstatus != SD_OK)
			return errorstatus; //响应错误
	}
	else
		return SD_INVALID_PARAMETER;

	SDIO_CmdInitStructure.SDIO_Argument = (u32)RCA << 16; //发送CMD13,查询卡的状态,短响应
	SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SEND_STATUS;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SD_CMD_SEND_STATUS); //等待R1响应

	if (errorstatus != SD_OK)
		return errorstatus;
	cardstatus = SDIO->RESP1;
	timeout = SD_DATATIMEOUT;
	while (((cardstatus & 0x00000100) == 0) && (timeout > 0)) //检查READY_FOR_DATA位是否置位
	{
		timeout--;

		SDIO_CmdInitStructure.SDIO_Argument = (u32)RCA << 16; //发送CMD13,查询卡的状态,短响应
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SEND_STATUS;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SD_CMD_SEND_STATUS); //等待R1响应

		if (errorstatus != SD_OK)
			return errorstatus;

		cardstatus = SDIO->RESP1;
	}
	if (timeout == 0)
		return SD_ERROR;

	SDIO_CmdInitStructure.SDIO_Argument = addr; //发送CMD24,写单块指令,短响应
	SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_WRITE_SINGLE_BLOCK;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SD_CMD_WRITE_SINGLE_BLOCK); //等待R1响应

	if (errorstatus != SD_OK)
		return errorstatus;

	StopCondition = 0; //单块写,不需要发送停止传输指令

	SDIO_DataInitStructure.SDIO_DataBlockSize = power << 4;
	; //blksize, 控制器到卡
	SDIO_DataInitStructure.SDIO_DataLength = blksize;
	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataConfig(&SDIO_DataInitStructure);

	timeout = SDIO_DATATIMEOUT;

	if (DeviceMode == SD_POLLING_MODE)
	{
		INTX_DISABLE();																   //关闭总中断(POLLING模式,严禁中断打断SDIO读写操作!!!)
		while (!(SDIO->STA & ((1 << 10) | (1 << 4) | (1 << 1) | (1 << 3) | (1 << 9)))) //数据块发送成功/下溢/CRC/超时/起始位错误
		{
			if (SDIO_GetFlagStatus(SDIO_FLAG_TXFIFOHE) != RESET) //发送区半空,表示至少存了8个字
			{
				if ((tlen - bytestransferred) < SD_HALFFIFOBYTES) //不够32字节了
				{
					restwords = ((tlen - bytestransferred) % 4 == 0) ? ((tlen - bytestransferred) / 4) : ((tlen - bytestransferred) / 4 + 1);

					for (count = 0; count < restwords; count++, tempbuff++, bytestransferred += 4)
					{
						SDIO->FIFO = *tempbuff;
					}
				}
				else
				{
					for (count = 0; count < 8; count++)
					{
						SDIO->FIFO = *(tempbuff + count);
					}
					tempbuff += 8;
					bytestransferred += 32;
				}
				timeout = 0X3FFFFFFF; //写数据溢出时间
			}
			else
			{
				if (timeout == 0)
					return SD_DATA_TIMEOUT;
				timeout--;
			}
		}
		if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET) //数据超时错误
		{
			SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT); //清错误标志
			return SD_DATA_TIMEOUT;
		}
		else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET) //数据块CRC错误
		{
			SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL); //清错误标志
			return SD_DATA_CRC_FAIL;
		}
		else if (SDIO_GetFlagStatus(SDIO_FLAG_TXUNDERR) != RESET) //接收fifo下溢错误
		{
			SDIO_ClearFlag(SDIO_FLAG_TXUNDERR); //清错误标志
			return SD_TX_UNDERRUN;
		}
		else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET) //接收起始位错误
		{
			SDIO_ClearFlag(SDIO_FLAG_STBITERR); //清错误标志
			return SD_START_BIT_ERR;
		}

		INTX_ENABLE();					   //开启总中断
		SDIO_ClearFlag(SDIO_STATIC_FLAGS); //清除所有标记
	}
	else if (DeviceMode == SD_DMA_MODE)
	{
		TransferError = SD_OK;
		StopCondition = 0;													//单块写,不需要发送停止传输指令
		TransferEnd = 0;													//传输结束标置位，在中断服务置1
		SDIO->MASK |= (1 << 1) | (1 << 3) | (1 << 8) | (1 << 4) | (1 << 9); //配置产生数据接收完成中断
		SD_DMA_Config((u32 *)buf, blksize, DMA_DIR_MemoryToPeripheral);		//SDIO DMA配置
		SDIO->DCTRL |= 1 << 3;												//SDIO DMA使能.
		while (((DMA2->LISR & (1 << 27)) == RESET) && timeout)
			timeout--; //等待传输完成
		if (timeout == 0)
		{
			SD_Init();				//重新初始化SD卡,可以解决写入死机的问题
			return SD_DATA_TIMEOUT; //超时
		}
		timeout = SDIO_DATATIMEOUT;
		while ((TransferEnd == 0) && (TransferError == SD_OK) && timeout)
			timeout--;
		if (timeout == 0)
			return SD_DATA_TIMEOUT; //超时
		if (TransferError != SD_OK)
			return TransferError;
	}
	SDIO_ClearFlag(SDIO_STATIC_FLAGS); //清除所有标记
	errorstatus = IsCardProgramming(&cardstate);
	while ((errorstatus == SD_OK) && ((cardstate == SD_CARD_PROGRAMMING) || (cardstate == SD_CARD_RECEIVING)))
	{
		errorstatus = IsCardProgramming(&cardstate);
	}
	return errorstatus;
}
//SD卡写多个块
//buf:数据缓存区
//addr:写地址
//blksize:块大小
//nblks:要写入的块数
//返回值:错误状态
SD_Error SD_WriteMultiBlocks(u8 *buf, long long addr, u16 blksize, u32 nblks)
{
	SD_Error errorstatus = SD_OK;
	u8 power = 0, cardstate = 0;
	u32 timeout = 0, bytestransferred = 0;
	u32 count = 0, restwords = 0;
	u32 tlen = nblks * blksize; //总长度(字节)
	u32 *tempbuff = (u32 *)buf;
	if (buf == NULL)
		return SD_INVALID_PARAMETER; //参数错误
	SDIO->DCTRL = 0x0;				 //数据控制寄存器清零(关DMA)

	SDIO_DataInitStructure.SDIO_DataBlockSize = 0;
	; //清除DPSM状态机配置
	SDIO_DataInitStructure.SDIO_DataLength = 0;
	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataConfig(&SDIO_DataInitStructure);

	if (SDIO->RESP1 & SD_CARD_LOCKED)
		return SD_LOCK_UNLOCK_FAILED;			//卡锁了
	if (CardType == SDIO_HIGH_CAPACITY_SD_CARD) //大容量卡
	{
		blksize = 512;
		addr >>= 9;
	}
	if ((blksize > 0) && (blksize <= 2048) && ((blksize & (blksize - 1)) == 0))
	{
		power = convert_from_bytes_to_power_of_two(blksize);

		SDIO_CmdInitStructure.SDIO_Argument = blksize; //发送CMD16+设置数据长度为blksize,短响应
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SET_BLOCKLEN;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SD_CMD_SET_BLOCKLEN); //等待R1响应

		if (errorstatus != SD_OK)
			return errorstatus; //响应错误
	}
	else
		return SD_INVALID_PARAMETER;
	if (nblks > 1)
	{
		if (nblks * blksize > SD_MAX_DATA_LENGTH)
			return SD_INVALID_PARAMETER;
		if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
		{
			//提高性能
			SDIO_CmdInitStructure.SDIO_Argument = (u32)RCA << 16; //发送ACMD55,短响应
			SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_APP_CMD;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);

			errorstatus = CmdResp1Error(SD_CMD_APP_CMD); //等待R1响应

			if (errorstatus != SD_OK)
				return errorstatus;

			SDIO_CmdInitStructure.SDIO_Argument = nblks; //发送CMD23,设置块数量,短响应
			SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SET_BLOCK_COUNT;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);

			errorstatus = CmdResp1Error(SD_CMD_SET_BLOCK_COUNT); //等待R1响应

			if (errorstatus != SD_OK)
				return errorstatus;
		}

		SDIO_CmdInitStructure.SDIO_Argument = addr; //发送CMD25,多块写指令,短响应
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_WRITE_MULT_BLOCK;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SD_CMD_WRITE_MULT_BLOCK); //等待R1响应

		if (errorstatus != SD_OK)
			return errorstatus;

		SDIO_DataInitStructure.SDIO_DataBlockSize = power << 4;
		; //blksize, 控制器到卡
		SDIO_DataInitStructure.SDIO_DataLength = nblks * blksize;
		SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
		SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
		SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
		SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
		SDIO_DataConfig(&SDIO_DataInitStructure);

		if (DeviceMode == SD_POLLING_MODE)
		{
			timeout = SDIO_DATATIMEOUT;
			INTX_DISABLE();																  //关闭总中断(POLLING模式,严禁中断打断SDIO读写操作!!!)
			while (!(SDIO->STA & ((1 << 4) | (1 << 1) | (1 << 8) | (1 << 3) | (1 << 9)))) //下溢/CRC/数据结束/超时/起始位错误
			{
				if (SDIO_GetFlagStatus(SDIO_FLAG_TXFIFOHE) != RESET) //发送区半空,表示至少存了8字(32字节)
				{
					if ((tlen - bytestransferred) < SD_HALFFIFOBYTES) //不够32字节了
					{
						restwords = ((tlen - bytestransferred) % 4 == 0) ? ((tlen - bytestransferred) / 4) : ((tlen - bytestransferred) / 4 + 1);
						for (count = 0; count < restwords; count++, tempbuff++, bytestransferred += 4)
						{
							SDIO->FIFO = *tempbuff;
						}
					}
					else //发送区半空,可以发送至少8字(32字节)数据
					{
						for (count = 0; count < SD_HALFFIFO; count++)
						{
							SDIO->FIFO = *(tempbuff + count);
						}
						tempbuff += SD_HALFFIFO;
						bytestransferred += SD_HALFFIFOBYTES;
					}
					timeout = 0X3FFFFFFF; //写数据溢出时间
				}
				else
				{
					if (timeout == 0)
						return SD_DATA_TIMEOUT;
					timeout--;
				}
			}
			if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET) //数据超时错误
			{
				SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT); //清错误标志
				return SD_DATA_TIMEOUT;
			}
			else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET) //数据块CRC错误
			{
				SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL); //清错误标志
				return SD_DATA_CRC_FAIL;
			}
			else if (SDIO_GetFlagStatus(SDIO_FLAG_TXUNDERR) != RESET) //接收fifo下溢错误
			{
				SDIO_ClearFlag(SDIO_FLAG_TXUNDERR); //清错误标志
				return SD_TX_UNDERRUN;
			}
			else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET) //接收起始位错误
			{
				SDIO_ClearFlag(SDIO_FLAG_STBITERR); //清错误标志
				return SD_START_BIT_ERR;
			}

			if (SDIO_GetFlagStatus(SDIO_FLAG_DATAEND) != RESET) //发送结束
			{
				if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
				{
					SDIO_CmdInitStructure.SDIO_Argument = 0; //发送CMD12+结束传输
					SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_STOP_TRANSMISSION;
					SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
					SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
					SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
					SDIO_SendCommand(&SDIO_CmdInitStructure);

					errorstatus = CmdResp1Error(SD_CMD_STOP_TRANSMISSION); //等待R1响应
					if (errorstatus != SD_OK)
						return errorstatus;
				}
			}
			INTX_ENABLE();					   //开启总中断
			SDIO_ClearFlag(SDIO_STATIC_FLAGS); //清除所有标记
		}
		else if (DeviceMode == SD_DMA_MODE)
		{
			TransferError = SD_OK;
			StopCondition = 1;														//多块写,需要发送停止传输指令
			TransferEnd = 0;														//传输结束标置位，在中断服务置1
			SDIO->MASK |= (1 << 1) | (1 << 3) | (1 << 8) | (1 << 4) | (1 << 9);		//配置产生数据接收完成中断
			SD_DMA_Config((u32 *)buf, nblks * blksize, DMA_DIR_MemoryToPeripheral); //SDIO DMA配置
			SDIO->DCTRL |= 1 << 3;													//SDIO DMA使能.
			timeout = SDIO_DATATIMEOUT;
			while (((DMA2->LISR & (1 << 27)) == RESET) && timeout)
				timeout--;	  //等待传输完成
			if (timeout == 0) //超时
			{
				SD_Init();				//重新初始化SD卡,可以解决写入死机的问题
				return SD_DATA_TIMEOUT; //超时
			}
			timeout = SDIO_DATATIMEOUT;
			while ((TransferEnd == 0) && (TransferError == SD_OK) && timeout)
				timeout--;
			if (timeout == 0)
				return SD_DATA_TIMEOUT; //超时
			if (TransferError != SD_OK)
				return TransferError;
		}
	}
	SDIO_ClearFlag(SDIO_STATIC_FLAGS); //清除所有标记
	errorstatus = IsCardProgramming(&cardstate);
	while ((errorstatus == SD_OK) && ((cardstate == SD_CARD_PROGRAMMING) || (cardstate == SD_CARD_RECEIVING)))
	{
		errorstatus = IsCardProgramming(&cardstate);
	}
	return errorstatus;
}
//SDIO中断服务函数
void SDIO_IRQHandler(void)
{
	SD_ProcessIRQSrc(); //处理所有SDIO相关中断
}
//SDIO中断处理函数
//处理SDIO传输过程中的各种中断事务
//返回值:错误代码
SD_Error SD_ProcessIRQSrc(void)
{
	if (SDIO_GetFlagStatus(SDIO_FLAG_DATAEND) != RESET) //接收完成中断
	{
		if (StopCondition == 1)
		{
			SDIO_CmdInitStructure.SDIO_Argument = 0; //发送CMD12+结束传输
			SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_STOP_TRANSMISSION;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);

			TransferError = CmdResp1Error(SD_CMD_STOP_TRANSMISSION);
		}
		else
			TransferError = SD_OK;
		SDIO->ICR |= 1 << 8;																					  //清除完成中断标记
		SDIO->MASK &= ~((1 << 1) | (1 << 3) | (1 << 8) | (1 << 14) | (1 << 15) | (1 << 4) | (1 << 5) | (1 << 9)); //关闭相关中断
		TransferEnd = 1;
		return (TransferError);
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET) //数据CRC错误
	{
		SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL);																		  //清错误标志
		SDIO->MASK &= ~((1 << 1) | (1 << 3) | (1 << 8) | (1 << 14) | (1 << 15) | (1 << 4) | (1 << 5) | (1 << 9)); //关闭相关中断
		TransferError = SD_DATA_CRC_FAIL;
		return (SD_DATA_CRC_FAIL);
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET) //数据超时错误
	{
		SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT);																		  //清中断标志
		SDIO->MASK &= ~((1 << 1) | (1 << 3) | (1 << 8) | (1 << 14) | (1 << 15) | (1 << 4) | (1 << 5) | (1 << 9)); //关闭相关中断
		TransferError = SD_DATA_TIMEOUT;
		return (SD_DATA_TIMEOUT);
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET) //FIFO上溢错误
	{
		SDIO_ClearFlag(SDIO_FLAG_RXOVERR);																		  //清中断标志
		SDIO->MASK &= ~((1 << 1) | (1 << 3) | (1 << 8) | (1 << 14) | (1 << 15) | (1 << 4) | (1 << 5) | (1 << 9)); //关闭相关中断
		TransferError = SD_RX_OVERRUN;
		return (SD_RX_OVERRUN);
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_TXUNDERR) != RESET) //FIFO下溢错误
	{
		SDIO_ClearFlag(SDIO_FLAG_TXUNDERR);																		  //清中断标志
		SDIO->MASK &= ~((1 << 1) | (1 << 3) | (1 << 8) | (1 << 14) | (1 << 15) | (1 << 4) | (1 << 5) | (1 << 9)); //关闭相关中断
		TransferError = SD_TX_UNDERRUN;
		return (SD_TX_UNDERRUN);
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET) //起始位错误
	{
		SDIO_ClearFlag(SDIO_FLAG_STBITERR);																		  //清中断标志
		SDIO->MASK &= ~((1 << 1) | (1 << 3) | (1 << 8) | (1 << 14) | (1 << 15) | (1 << 4) | (1 << 5) | (1 << 9)); //关闭相关中断
		TransferError = SD_START_BIT_ERR;
		return (SD_START_BIT_ERR);
	}
	return (SD_OK);
}

//检查CMD0的执行状态
//返回值:sd卡错误码
SD_Error CmdError(void)
{
	SD_Error errorstatus = SD_OK;
	u32 timeout = SDIO_CMD0TIMEOUT;
	while (timeout--)
	{
		if (SDIO_GetFlagStatus(SDIO_FLAG_CMDSENT) != RESET)
			break; //命令已发送(无需响应)
	}
	if (timeout == 0)
		return SD_CMD_RSP_TIMEOUT;
	SDIO_ClearFlag(SDIO_STATIC_FLAGS); //清除所有标记
	return errorstatus;
}
//检查R7响应的错误状态
//返回值:sd卡错误码
SD_Error CmdResp7Error(void)
{
	SD_Error errorstatus = SD_OK;
	u32 status;
	u32 timeout = SDIO_CMD0TIMEOUT;
	while (timeout--)
	{
		status = SDIO->STA;
		if (status & ((1 << 0) | (1 << 2) | (1 << 6)))
			break; //CRC错误/命令响应超时/已经收到响应(CRC校验成功)
	}
	if ((timeout == 0) || (status & (1 << 2))) //响应超时
	{
		errorstatus = SD_CMD_RSP_TIMEOUT;	//当前卡不是2.0兼容卡,或者不支持设定的电压范围
		SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT); //清除命令响应超时标志
		return errorstatus;
	}
	if (status & 1 << 6) //成功接收到响应
	{
		errorstatus = SD_OK;
		SDIO_ClearFlag(SDIO_FLAG_CMDREND); //清除响应标志
	}
	return errorstatus;
}
//检查R1响应的错误状态
//cmd:当前命令
//返回值:sd卡错误码
SD_Error CmdResp1Error(u8 cmd)
{
	u32 status;
	while (1)
	{
		status = SDIO->STA;
		if (status & ((1 << 0) | (1 << 2) | (1 << 6)))
			break; //CRC错误/命令响应超时/已经收到响应(CRC校验成功)
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_CTIMEOUT) != RESET) //响应超时
	{
		SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT); //清除命令响应超时标志
		return SD_CMD_RSP_TIMEOUT;
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_CCRCFAIL) != RESET) //CRC错误
	{
		SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL); //清除标志
		return SD_CMD_CRC_FAIL;
	}
	if (SDIO->RESPCMD != cmd)
		return SD_ILLEGAL_CMD;						   //命令不匹配
	SDIO_ClearFlag(SDIO_STATIC_FLAGS);				   //清除所有标记
	return (SD_Error)(SDIO->RESP1 & SD_OCR_ERRORBITS); //返回卡响应
}
//检查R3响应的错误状态
//返回值:错误状态
SD_Error CmdResp3Error(void)
{
	u32 status;
	while (1)
	{
		status = SDIO->STA;
		if (status & ((1 << 0) | (1 << 2) | (1 << 6)))
			break; //CRC错误/命令响应超时/已经收到响应(CRC校验成功)
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_CTIMEOUT) != RESET) //响应超时
	{
		SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT); //清除命令响应超时标志
		return SD_CMD_RSP_TIMEOUT;
	}
	SDIO_ClearFlag(SDIO_STATIC_FLAGS); //清除所有标记
	return SD_OK;
}
//检查R2响应的错误状态
//返回值:错误状态
SD_Error CmdResp2Error(void)
{
	SD_Error errorstatus = SD_OK;
	u32 status;
	u32 timeout = SDIO_CMD0TIMEOUT;
	while (timeout--)
	{
		status = SDIO->STA;
		if (status & ((1 << 0) | (1 << 2) | (1 << 6)))
			break; //CRC错误/命令响应超时/已经收到响应(CRC校验成功)
	}
	if ((timeout == 0) || (status & (1 << 2))) //响应超时
	{
		errorstatus = SD_CMD_RSP_TIMEOUT;
		SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT); //清除命令响应超时标志
		return errorstatus;
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_CCRCFAIL) != RESET) //CRC错误
	{
		errorstatus = SD_CMD_CRC_FAIL;
		SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL); //清除响应标志
	}
	SDIO_ClearFlag(SDIO_STATIC_FLAGS); //清除所有标记
	return errorstatus;
}
//检查R6响应的错误状态
//cmd:之前发送的命令
//prca:卡返回的RCA地址
//返回值:错误状态
SD_Error CmdResp6Error(u8 cmd, u16 *prca)
{
	SD_Error errorstatus = SD_OK;
	u32 status;
	u32 rspr1;
	while (1)
	{
		status = SDIO->STA;
		if (status & ((1 << 0) | (1 << 2) | (1 << 6)))
			break; //CRC错误/命令响应超时/已经收到响应(CRC校验成功)
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_CTIMEOUT) != RESET) //响应超时
	{
		SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT); //清除命令响应超时标志
		return SD_CMD_RSP_TIMEOUT;
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_CCRCFAIL) != RESET) //CRC错误
	{
		SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL); //清除响应标志
		return SD_CMD_CRC_FAIL;
	}
	if (SDIO->RESPCMD != cmd) //判断是否响应cmd命令
	{
		return SD_ILLEGAL_CMD;
	}
	SDIO_ClearFlag(SDIO_STATIC_FLAGS); //清除所有标记
	rspr1 = SDIO->RESP1;			   //得到响应
	if (SD_ALLZERO == (rspr1 & (SD_R6_GENERAL_UNKNOWN_ERROR | SD_R6_ILLEGAL_CMD | SD_R6_COM_CRC_FAILED)))
	{
		*prca = (u16)(rspr1 >> 16); //右移16位得到,rca
		return errorstatus;
	}
	if (rspr1 & SD_R6_GENERAL_UNKNOWN_ERROR)
		return SD_GENERAL_UNKNOWN_ERROR;
	if (rspr1 & SD_R6_ILLEGAL_CMD)
		return SD_ILLEGAL_CMD;
	if (rspr1 & SD_R6_COM_CRC_FAILED)
		return SD_COM_CRC_FAILED;
	return errorstatus;
}

//SDIO使能宽总线模式
//enx:0,不使能;1,使能;
//返回值:错误状态
SD_Error SDEnWideBus(u8 enx)
{
	SD_Error errorstatus = SD_OK;
	u32 scr[2] = {0, 0};
	u8 arg = 0X00;
	if (enx)
		arg = 0X02;
	else
		arg = 0X00;
	if (SDIO->RESP1 & SD_CARD_LOCKED)
		return SD_LOCK_UNLOCK_FAILED; //SD卡处于LOCKED状态
	errorstatus = FindSCR(RCA, scr);  //得到SCR寄存器数据
	if (errorstatus != SD_OK)
		return errorstatus;
	if ((scr[1] & SD_WIDE_BUS_SUPPORT) != SD_ALLZERO) //支持宽总线
	{
		SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)RCA << 16; //发送CMD55+RCA,短响应
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_APP_CMD;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SD_CMD_APP_CMD);

		if (errorstatus != SD_OK)
			return errorstatus;

		SDIO_CmdInitStructure.SDIO_Argument = arg; //发送ACMD6,短响应,参数:10,4位;00,1位.
		SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_APP_SD_SET_BUSWIDTH;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SD_CMD_APP_SD_SET_BUSWIDTH);

		return errorstatus;
	}
	else
		return SD_REQUEST_NOT_APPLICABLE; //不支持宽总线设置
}
//检查卡是否正在执行写操作
//pstatus:当前状态.
//返回值:错误代码
SD_Error IsCardProgramming(u8 *pstatus)
{
	vu32 respR1 = 0, status = 0;

	SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)RCA << 16; //卡相对地址参数
	SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SEND_STATUS;  //发送CMD13
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	status = SDIO->STA;

	while (!(status & ((1 << 0) | (1 << 6) | (1 << 2))))
		status = SDIO->STA;								 //等待操作完成
	if (SDIO_GetFlagStatus(SDIO_FLAG_CCRCFAIL) != RESET) //CRC检测失败
	{
		SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL); //清除错误标记
		return SD_CMD_CRC_FAIL;
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_CTIMEOUT) != RESET) //命令超时
	{
		SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT); //清除错误标记
		return SD_CMD_RSP_TIMEOUT;
	}
	if (SDIO->RESPCMD != SD_CMD_SEND_STATUS)
		return SD_ILLEGAL_CMD;
	SDIO_ClearFlag(SDIO_STATIC_FLAGS); //清除所有标记
	respR1 = SDIO->RESP1;
	*pstatus = (u8)((respR1 >> 9) & 0x0000000F);
	return SD_OK;
}
//读取当前卡状态
//pcardstatus:卡状态
//返回值:错误代码
SD_Error SD_SendStatus(uint32_t *pcardstatus)
{
	SD_Error errorstatus = SD_OK;
	if (pcardstatus == NULL)
	{
		errorstatus = SD_INVALID_PARAMETER;
		return errorstatus;
	}

	SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)RCA << 16; //发送CMD13,短响应
	SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SEND_STATUS;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SD_CMD_SEND_STATUS); //查询响应状态
	if (errorstatus != SD_OK)
		return errorstatus;
	*pcardstatus = SDIO->RESP1; //读取响应值
	return errorstatus;
}
//返回SD卡的状态
//返回值:SD卡状态
SDCardState SD_GetState(void)
{
	u32 resp1 = 0;
	if (SD_SendStatus(&resp1) != SD_OK)
		return SD_CARD_ERROR;
	else
		return (SDCardState)((resp1 >> 9) & 0x0F);
}
//查找SD卡的SCR寄存器值
//rca:卡相对地址
//pscr:数据缓存区(存储SCR内容)
//返回值:错误状态
SD_Error FindSCR(u16 rca, u32 *pscr)
{
	u32 index = 0;
	SD_Error errorstatus = SD_OK;
	u32 tempscr[2] = {0, 0};

	SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)8;		   //发送CMD16,短响应,设置Block Size为8字节
	SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SET_BLOCKLEN; //	 cmd16
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short; //r1
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SD_CMD_SET_BLOCKLEN);

	if (errorstatus != SD_OK)
		return errorstatus;

	SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)RCA << 16;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_APP_CMD; //发送CMD55,短响应
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SD_CMD_APP_CMD);
	if (errorstatus != SD_OK)
		return errorstatus;

	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DataLength = 8;						   //8个字节长度,block为8字节,SD卡到SDIO.
	SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_8b; //块大小8byte
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToSDIO;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
	SDIO_DataConfig(&SDIO_DataInitStructure);

	SDIO_CmdInitStructure.SDIO_Argument = 0x0;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SD_APP_SEND_SCR; //发送ACMD51,短响应,参数为0
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;	  //r1
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SD_CMD_SD_APP_SEND_SCR);
	if (errorstatus != SD_OK)
		return errorstatus;
	while (!(SDIO->STA & (SDIO_FLAG_RXOVERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_DBCKEND | SDIO_FLAG_STBITERR)))
	{
		if (SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET) //接收FIFO数据可用
		{
			*(tempscr + index) = SDIO->FIFO; //读取FIFO内容
			index++;
			if (index >= 2)
				break;
		}
	}
	if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET) //数据超时错误
	{
		SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT); //清错误标志
		return SD_DATA_TIMEOUT;
	}
	else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET) //数据块CRC错误
	{
		SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL); //清错误标志
		return SD_DATA_CRC_FAIL;
	}
	else if (SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET) //接收fifo上溢错误
	{
		SDIO_ClearFlag(SDIO_FLAG_RXOVERR); //清错误标志
		return SD_RX_OVERRUN;
	}
	else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET) //接收起始位错误
	{
		SDIO_ClearFlag(SDIO_FLAG_STBITERR); //清错误标志
		return SD_START_BIT_ERR;
	}
	SDIO_ClearFlag(SDIO_STATIC_FLAGS); //清除所有标记
	//把数据顺序按8位为单位倒过来.
	*(pscr + 1) = ((tempscr[0] & SD_0TO7BITS) << 24) | ((tempscr[0] & SD_8TO15BITS) << 8) | ((tempscr[0] & SD_16TO23BITS) >> 8) | ((tempscr[0] & SD_24TO31BITS) >> 24);
	*(pscr) = ((tempscr[1] & SD_0TO7BITS) << 24) | ((tempscr[1] & SD_8TO15BITS) << 8) | ((tempscr[1] & SD_16TO23BITS) >> 8) | ((tempscr[1] & SD_24TO31BITS) >> 24);
	return errorstatus;
}
//得到NumberOfBytes以2为底的指数.
//NumberOfBytes:字节数.
//返回值:以2为底的指数值
u8 convert_from_bytes_to_power_of_two(u16 NumberOfBytes)
{
	u8 count = 0;
	while (NumberOfBytes != 1)
	{
		NumberOfBytes >>= 1;
		count++;
	}
	return count;
}

//配置SDIO DMA
//mbuf:存储器地址
//bufsize:传输数据量
//dir:方向;DMA_DIR_MemoryToPeripheral  存储器-->SDIO(写数据);DMA_DIR_PeripheralToMemory SDIO-->存储器(读数据);
void SD_DMA_Config(u32 *mbuf, u32 bufsize, u32 dir)
{

	DMA_InitTypeDef DMA_InitStructure;

	while (DMA_GetCmdStatus(DMA2_Stream3) != DISABLE)
	{
	} //等待DMA可配置

	DMA_DeInit(DMA2_Stream3); //清空之前该stream3上的所有中断标志

	DMA_InitStructure.DMA_Channel = DMA_Channel_4;							//通道选择
	DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&SDIO->FIFO;			//DMA外设地址
	DMA_InitStructure.DMA_Memory0BaseAddr = (u32)mbuf;						//DMA 存储器0地址
	DMA_InitStructure.DMA_DIR = dir;										//存储器到外设模式
	DMA_InitStructure.DMA_BufferSize = 0;									//数据传输量
	DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;		//外设非增量模式
	DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;					//存储器增量模式
	DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word; //外设数据长度:32位
	DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;			//存储器数据长度:32位
	DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;							// 使用普通模式
	DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;					//最高优先级
	DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;					//FIFO使能
	DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;			//全FIFO
	DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_INC4;				//外设突发4次传输
	DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_INC4;		//存储器突发4次传输
	DMA_Init(DMA2_Stream3, &DMA_InitStructure);								//初始化DMA Stream

	DMA_FlowControllerConfig(DMA2_Stream3, DMA_FlowCtrl_Peripheral); //外设流控制

	DMA_Cmd(DMA2_Stream3, ENABLE); //开启DMA传输
}

//读SD卡
//buf:读数据缓存区
//sector:扇区地址
//cnt:扇区个数
//返回值:错误状态;0,正常;其他,错误代码;
u8 SD_ReadDisk(u8 *buf, u32 sector, u8 cnt)
{
	u8 sta = SD_OK;
	long long lsector = sector;
	u8 n;
	lsector <<= 9;
	if ((u32)buf % 4 != 0)
	{
		for (n = 0; n < cnt; n++)
		{
			sta = SD_ReadBlock(SDIO_DATA_BUFFER, lsector + 512 * n, 512); //单个sector的读操作
			memcpy(buf, SDIO_DATA_BUFFER, 512);
			buf += 512;
		}
	}
	else
	{
		if (cnt == 1)
			sta = SD_ReadBlock(buf, lsector, 512); //单个sector的读操作
		else
			sta = SD_ReadMultiBlocks(buf, lsector, 512, cnt); //多个sector
	}
	return sta;
}
//写SD卡
//buf:写数据缓存区
//sector:扇区地址
//cnt:扇区个数
//返回值:错误状态;0,正常;其他,错误代码;
u8 SD_WriteDisk(u8 *buf, u32 sector, u8 cnt)
{
	u8 sta = SD_OK;
	u8 n;
	long long lsector = sector;
	lsector <<= 9;
	if ((u32)buf % 4 != 0)
	{
		for (n = 0; n < cnt; n++)
		{
			memcpy(SDIO_DATA_BUFFER, buf, 512);
			sta = SD_WriteBlock(SDIO_DATA_BUFFER, lsector + 512 * n, 512); //单个sector的写操作
			buf += 512;
		}
	}
	else
	{
		if (cnt == 1)
			sta = SD_WriteBlock(buf, lsector, 512); //单个sector的写操作
		else
			sta = SD_WriteMultiBlocks(buf, lsector, 512, cnt); //多个sector
	}
	return sta;
}
